MP3 unlike MP4MP4 is the most prevalent video file format (MPEG-4 Part 14). MP4, Apple’s preferred format, is compatible with most devices. It stores video, audio, and text files using the MPEG-4 encoding process, but it has a lesser resolution than some others. MP4 can be used for popular social media sites such as YouTube, Facebook, Twitter, and Instagram. More is an audio-only container that stands for MPEG-1 Audio Layer III. This format compresses audio files to make storing sound bites and music easier and more versatile.